Odin was a bit of a pain, but eventually I started the battle off with Syn-Med, let Hope get all of his buffs in while Lightning kept them both alive, then went between Com-Rav and Com-Med until I could trigger his Gestalt. Like Shlup, in most FFs I seldom use buffs/debuffs, but they have been absolute life savers in this game. Syn-Med with Lightning and Hope is a great paradigm for boss battles.

Loving the story, the combat, the characters, just everything!